Just did a playthrough, regarding the whip. I really like how physical it feels, it behaves like something in the real world to me.

I had some issues getting it to catch on to the levers, but then I am an inexperienced whip wielder so a bit hard to say if it's just me or not ;) But probably. I noticed that it seemed to stick to the lever, like it was made out of sticky goop like those things you could get in a plastic egg from a vending machine at the grocery store when I was a kid.

One thing that is a bit freaky is the roll-up :D It makes it feel like I'm actually holding a live snake or a huge worm! I kind of expected to find eyes on the whip if I took a closer look xD

But yeah, all in all it feels very physical and is kind of neat to carry around even if I didn't use it throughout the level (as you mentioned). If nothing else it can be used to fish gems out of the air.

I noticed that it seemed to stick to the lever, like it was made out of sticky goop like those things you could get in a plastic egg from a vending machine at the grocery store when I was a kid.

Indeed. :) The whip doesn't have any animation and is fully simulated, so when it curls around the lever it's due to physics. I do have to slightly "help" it happen though, by making the lever sticky under certain conditions. It's meant to only happen when you don't notice it, but sometimes my heuristic fails and it looks a bit odd...

One thing that is a bit freaky is the roll-up :D It makes it feel like I'm actually holding a live snake or a huge worm! I kind of expected to find eyes on the whip if I took a closer look xD

Haha, right! :D I'm not exactly sure how I could design the roll-up in a way that doesn't have this issue.